CN106186905B - A kind of cement-base composite material and preparation method thereof for mixing packet silicon nano-titanium dioxide - Google Patents
A kind of cement-base composite material and preparation method thereof for mixing packet silicon nano-titanium dioxide Download PDFInfo
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- CN106186905B CN106186905B CN201610505181.2A CN201610505181A CN106186905B CN 106186905 B CN106186905 B CN 106186905B CN 201610505181 A CN201610505181 A CN 201610505181A CN 106186905 B CN106186905 B CN 106186905B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1066—Oxides, Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/90—Electrical properties
- C04B2111/94—Electrically conducting materials
Abstract
The invention discloses a kind of cement-base composite materials for mixing packet silicon nano-titanium dioxide, contain cement, packet silicon nano-titanium dioxide, silicon ash, flyash, sand, water-reducing agent and water.The invention also discloses a kind of methods preparing cement-base composite material.The experimental results showed that, the advantages of mixing both cement-base composite material combination nano-titanium dioxide, the silica of packet silicon nano-titanium dioxide, make full use of toughening effect, filing effect, nucleating effect and the volcano ash effect that both nano-titanium dioxide, silica have, and high intensity, the characteristics of high tenacity, the cement-base composite material that packet silicon nano-titanium dioxide no matter is mixed in terms of flexural strength, compression strength or durability are all better than the cement-base composite material for only mixing nano-titanium dioxide.In addition, the cement-base composite material for mixing packet silicon nano-titanium dioxide also has electrology characteristic, meet the multi-functional and intelligent requirement of the following structural material.
Description
Technical field
The present invention relates to building material technical field, more particularly to a kind of cement base for mixing packet silicon nano-titanium dioxide is compound
Material and preparation method thereof.
Background technology
As the cement-based material of one of current most important construction material, higher, the easy to use, valence with compression strength
The advantages that lattice are cheap, production method is simple makes it be widely used in building, hydraulic engineering.But with modern society
High speed development, cement material has been unable to meet certain particular surroundings to material from the problems such as great, low tenacity, single role
The requirement of performance, at present there is an urgent need to a kind of dead load is small, high intensity, high tenacity, and with multi-functional cement base
Material.
Nano-titanium dioxide is it is verified that the mechanical properties such as the intensity, toughness of cement-based material and electricity can be improved
Performance, but it is limited to the strength improving effect of cement-based material.Although this is mainly due to nano-titanium dioxide have masterplate at
Core acts on and filling effect, can promote the hydration reaction of cement to a certain extent, but that there are porositys is big for cement matrix, interior
Portion loosely waits self-defects, and the combination interface of cement matrix is caused also to have certain problem.
Invention content
According to technical problem set forth above, and provide a kind of cement base composite wood for mixing packet silicon nano-titanium dioxide
Material and preparation method thereof.The technological means that the present invention uses is as follows：
A kind of cement-base composite material for mixing packet silicon nano-titanium dioxide contains cement, packet silicon nano-titanium dioxide, silicon
Ash, flyash, sand, water-reducing agent and water.
Substance containing following parts by weight：
1 part of cement,
0.002-0.1 parts of packet silicon nano-titanium dioxide,
0.2-0.4 parts of silicon ash,
0.1-0.2 parts of flyash,
1-2 parts of sand,
0.003-0.01 parts of water-reducing agent,
0.3-0.38 parts of water.
The packet silicon nano-titanium dioxide is the red schorl phase titanium dioxide of surface packet silicon, grain size 10nm-100nm.
The content of titanium dioxide is more than 96% in the packet silicon nano-titanium dioxide.
The grain size of the silicon ash is 100-200nm.
The grain size of the flyash is 0.12-0.83mm.
The sand includes quartz sand I, quartz sand II and quartz sand III, and the particle size range of the quartz sand I is 0.125-
0.18mm, the quartz sand II particle size range be 0.18-0.425mm, the particle size range of the quartz sand III is 0.425-
0.85mm, the mass ratio between the quartz sand I, the quartz sand II and the quartz sand III are 1:1:1.
The water-reducing agent is polycarboxylate water-reducer.
The cement is Portland cement.
The invention also discloses a kind of methods preparing cement-base composite material, have following steps：
Water, water-reducing agent, packet silicon nano-titanium dioxide are poured into agitated kettle by S1, the substance for weighing the parts by weight, and stirring turns
Speed is set as 140 ± 5r/min, stirs 20s, then pours into silicon ash in agitated kettle, and speed of agitator is set as 140 ± 5r/min, stirring
Cement and flyash are added sequentially in agitated kettle by 60s again later, and speed of agitator is set as 140 ± 5r/min, stir 2min
Afterwards, then by speed of agitator it is changed to 285 ± 10r/min, stirs 2min, finally pours into sand in agitated kettle, speed of agitator is set as 140
± 5r/min after stirring 1min, is stirred for rotating speed and is changed to 285 ± 10r/min, stir 4min；
S2, the mixture obtained in step S1 is poured into mold, then mold is placed on shake table, be vibrated to surface
There is bubble to emerge；
S3, mold is put into curing box, is 20 ± 1 DEG C in temperature, humidity conserves 24 hours under conditions of being more than 95%
Form removal afterwards obtains the cement-base composite material test specimen.
It, can be before step S3, according to mixture in mold in order to detect the performance of the cement-base composite material
Size is inserted into two electrodes for connecting external circuit, is vibrated again, it is ensured that electrode and mixture contact are good.The electricity
Extremely conductive mesh electrode piece, material is preferably stainless steel.
The advantages of both present invention combination nano-titanium dioxide, silica, certainly using nano-titanium dioxide, silica
The enhancing mechanism of body and the promotion humidification mutually cooperateed with, are finally prepared for small, high intensity of conducting oneself with dignity, high tenacity, and simultaneous
Has the cement-base composite material for mixing packet silicon nano-titanium dioxide of electrology characteristic.
1, nano-titanium dioxide has high specific surface area and reactivity, can be imitated by filing effect and nucleus
Should wait to increase hydrated product, keep cement matrix more closely knit, reduce inside configuration harmful hole and crack quantity (compare Fig. 1,
Known to Fig. 2), to improve the intensity of cement matrix.
2, with calcium hydroxide pozzolanic reaction can occur for silica, reduce adverse effect of the calcium hydroxide to intensity,
Promote cement early hydration reaction speed and the extent of reaction, form more hydrated calcium silicate gels, keep gel more closely knit, reduces
Calcium hydroxide crystals size and the orientation (compare Fig. 3, Fig. 4 and Fig. 5 known to) for changing calcium hydroxide crystals, and then from root
The combination interface for optimizing cement matrix in sheet, increases the intensity of cement-base composite material.
3, nano-titanium dioxide sheet has certain electric conductivity as semiconductor, since it has small-size effect, energy simultaneously
It is enough that conductive network is formed inside cement-based material, electric conductivity is improved, to make cement-base composite material resistivity reduce, is assigned
Its electrology characteristic.
4, there is the cement-base composite material for mixing packet silicon nano-titanium dioxide superior mechanical property, flexural strength to carry significantly
It is high, wherein flexural strength increases 55.91%-83.3% compared with blank within 3 days.
5, the cement-base composite material for mixing packet silicon nano-titanium dioxide has electrology characteristic, and resistivity can be with the increasing of volume
Add and first reduce and increase afterwards, resistivity is consistently less than the resistivity of blank cement-based material.
The present invention can be widely popularized in technical fields such as construction materials based on the above reasons.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the microcosmic stereoscan photograph of test specimen 1；
Fig. 2 is the microcosmic stereoscan photograph of test specimen 4；
Fig. 3 is the microcosmic stereoscan photograph of calcium hydroxide in test specimen 1；
Fig. 4 is the microcosmic stereoscan photograph of calcium hydroxide in test specimen 2；
Fig. 5 is the microcosmic stereoscan photograph of calcium hydroxide in test specimen 4；
Fig. 6 is sample dimensions and electrode arrangement schematic diagram；
The curve that Fig. 7 is 3 days, 28 day age test specimen flexural strength changes with titanium dioxide volume；
Fig. 8 is the curve that 3 days, 28 days and 60 day age test specimen compression strength changes with titanium dioxide volume；
Fig. 9 is the song mixed the cement-base composite material resistivity of packet silicon nano-titanium dioxide and changed with titanium dioxide volume
Line.
Specific implementation mode
A kind of cement-base composite material for mixing packet silicon nano-titanium dioxide contains cement, packet silicon nano-titanium dioxide, silicon
Ash, flyash, sand, water-reducing agent and water.
Substance containing following parts by weight：
1 part of cement,
0.002-0.1 parts of packet silicon nano-titanium dioxide,
0.2-0.4 parts of silicon ash,
0.1-0.2 parts of flyash,
1-2 parts of sand,
0.003-0.01 parts of water-reducing agent,
0.3-0.38 parts of water.
The packet silicon nano-titanium dioxide is the red schorl phase titanium dioxide of surface packet silicon, grain size 10nm-500nm.
The content of titanium dioxide is more than 96% in the packet silicon nano-titanium dioxide.
The grain size of the silicon ash is 100-200nm.
The grain size of the flyash is 0.12-0.83mm.
The sand includes quartz sand I, quartz sand II and quartz sand III, and the particle size range of the quartz sand I is 0.125-
0.18mm, the quartz sand II particle size range be 0.18-0.425mm, the particle size range of the quartz sand III is 0.425-
0.85mm, the mass ratio between the quartz sand I, the quartz sand II and the quartz sand III are 1:1:1 quartz sand III.
The water-reducing agent is polycarboxylate water-reducer.
A method of the cement-base composite material is prepared, there are following steps：
Water, water-reducing agent, packet silicon nano-titanium dioxide are poured into agitated kettle by S1, the substance for weighing the parts by weight, and stirring turns
Speed is set as 140 ± 5r/min, stirs 20s, then pours into silicon ash in agitated kettle, and speed of agitator is set as 140 ± 5r/min, stirring
Cement and flyash are added sequentially in agitated kettle by 60s again later, and speed of agitator is set as 140 ± 5r/min, stir 2min
Afterwards, then by speed of agitator it is changed to 285 ± 10r/min, stirs 2min, finally pours into sand in agitated kettle, speed of agitator is set as 140
Speed of agitator after stirring 1min, then is changed to 285 ± 10r/min, stirs 4min by ± 5r/min；
S2, the mixture obtained in step S1 is poured into mold, then mold is placed on shake table, be vibrated to surface
There is bubble to emerge；
S3, mold is put into curing box, is 20 ± 1 DEG C in temperature, humidity conserves 24 hours under conditions of being more than 95%
Form removal afterwards obtains the cement-base composite material test specimen.
Embodiment
A kind of cement-base composite material for mixing packet silicon nano-titanium dioxide
1 raw-material weight of table is than proportioning
Note：Packet silicon nano-titanium dioxide volume, which calculates, uses inner blending method.
S1, substance described in table 1 is weighed, water, water-reducing agent, packet silicon nano-titanium dioxide (test specimen 1 is not added with) is poured into agitated kettle,
Speed of agitator is set as 140 ± 5r/min, stirs 20s, then pours into silicon ash in agitated kettle, speed of agitator is set as 140 ± 5r/
Min stirs 60s, cement and flyash is added sequentially in agitated kettle again later, speed of agitator is set as 140 ± 5r/min, stirs
After mixing 2min, then speed of agitator is changed to 285 ± 10r/min, stirs 2min, finally pour into sand in agitated kettle, speed of agitator
To set 140 ± 5r/min, after stirring 1min, then speed of agitator is changed to 285 ± 10r/min, stirs 4min；
S2, the mixture obtained in step S1 is poured into mold 1 (40mm × 40mm × 160mm), then mold 1 is set
There is bubble to emerge on shake table, being vibrated to surface；
S3, according to the size of mixture in mold 1, be inserted into two electrodes 2 for connecting external circuit, vibrate again,
Ensure that electrode 2 and mixture contact are good.Later, mold 1 is put into curing box, is 20 ± 1 DEG C in temperature, humidity is more than
Form removal after being conserved 24 hours under conditions of 95%, obtains test specimen 1,2,3,4.
The electrode 2 is the mesh electrode piece of conduction, and material is preferably stainless steel.Described two electrodes 2 and 1 end of mold
Portion is arranged in parallel, respectively apart from 1 end 10mm of mold, as described in Figure 6.
It is conserved after form removal：Test specimen is immediately placed in 20 ± 1 DEG C of water after form removal and is conserved to required different larval instar,
The test specimen of wherein 60 day age is conserved in standard curing room to 28 days, then, quiet be put into 60 days is taken out from water and is tested.
Flexural strength：Flexural strength test is carried out with the anti-folding instrument of glue sand.
Compression strength：The compression strength of test specimen is measured with universal testing machine, displacement-control mode, loading speed is
1.2mm/min。
Resistance：It is tested with multimeter, test method is to exchange, two electrodes.
Resistivity is calculated by formula ρ=RS/l.
By Fig. 7, Fig. 8 it is found that mixing the cement-base composite material of 1% packet silicon nano-titanium dioxide than blank cement-based material
55.91% and 43.43% is respectively increased in 3 days and 28 days flexural strengths, than the cement-base composite material for mixing 1% nano-titanium dioxide
3 days and 28 days flexural strengths 36.22% and 2.41% is respectively increased.The cement base for mixing 3% packet silicon nano-titanium dioxide is multiple
83.3% and 74.9% has been respectively increased than blank cement-based material 3 days and 28 days flexural strengths in condensation material, than mixing 3% nanometer two
28.89% and 13.79% has been respectively increased in 3 days of the cement-base composite material of titanium oxide and 28 days flexural strengths.Mix 3% packet silicon
3 days, the 28 days and 60 days compression strength comparison blank cement-based material of the cement-base composite material of nano-titanium dioxide carries respectively
High by 18%, 12.26% and 34.35%, the cement-base composite material 3 days, 28 days and 60 days than mixing 3% nano-titanium dioxide is anti-
Compressive Strength has been respectively increased 15.91%, 2.43% and 2.72%.Mix the cement-base composite material of 5% packet silicon nano-titanium dioxide
It is respectively increased 73.73% and 87% than blank cement-based material 3 days and 28 days flexural strengths, and resistance to compression in 3 days, 28 days and 60 days
Intensity has been respectively increased 4.09%, 10.32% and 38.27%.5% packet silicon nano-titanium dioxide cement-base composite material ratio is mixed to mix
The cement-base composite material of 5% nano-titanium dioxide 3 days and 28 days flexural strengths have been respectively increased 34.4% and 21.97%, and 3
It, 28 days and 60 days compression strength be respectively increased 13.41%, 1.42% and 4.7%.The experimental results showed that mixing packet silicon nanometer
The cement-base composite material of titanium dioxide not only increases the compression strength of cement-based material, and it is anti-that it is greatly improved
Intensity is rolled over, early stage flexural strength improves degree and is up to 83.3%, and 28 day age flexural strength improves degree and be up to 87%.In addition,
The 60 days compression strength of cement-base composite material for mixing packet silicon nano-titanium dioxide is substantially improved, and highest improves degree and is up to
38.27%.
As shown in Figure 9, the admixture of packet silicon nano-titanium dioxide can improve the electric conductivity of cement-based material.Wherein add
1% packet silicon nano-titanium dioxide can make 28 days resistivity of cement-based material reduce by 6.98%.Add 3% packet silicon nanometer
Titanium dioxide can make 28 days resistivity of cement-based material reduce by 17.84%.The packet silicon nano-titanium dioxide for adding 5% can be with
28 days resistivity of cement-based material are made to reduce by 11.75%.This illustrates that packet silicon nano-titanium dioxide can assign cement-based material
Electrology characteristic.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of cement-base composite material for mixing packet silicon nano-titanium dioxide,
Substance containing following parts by weight：
1 part of cement,
0.002-0.1 parts of packet silicon nano-titanium dioxide,
0.2-0.4 parts of silicon ash,
0.1-0.2 parts of flyash,
1-2 parts of sand,
0.003-0.01 parts of water-reducing agent,
0.3-0.38 parts of water.
2. cement-base composite material according to claim 1, which is characterized in that the packet silicon nano-titanium dioxide is surface
The red schorl phase titanium dioxide of packet silicon, grain size 10nm-100nm.
3. cement-base composite material according to claim 1, which is characterized in that dioxy in the packet silicon nano-titanium dioxide
The content for changing titanium is more than 96%.
4. cement-base composite material according to claim 1, which is characterized in that the grain size of the silicon ash is 100-200nm.
5. cement-base composite material according to claim 1, which is characterized in that the grain size of the flyash is 0.12-
0.83mm。
6. cement-base composite material according to claim 1, which is characterized in that the sand includes quartz sand I, quartz sand II
With quartz sand III, the particle size range of the quartz sand I is 0.125-0.18mm, the particle size range of the quartz sand II is 0.18-
0.425mm, the quartz sand III particle size range be 0.425-0.85mm, the quartz sand I, the quartz sand II and the stone
Mass ratio between sand III is 1:1:1.
7. cement-base composite material according to claim 1, which is characterized in that the water-reducing agent is polycarboxylate water-reducer.
8. a kind of method preparing cement-base composite material described in claim 1, it is characterised in that have following steps：
Water, water-reducing agent, packet silicon nano-titanium dioxide are poured into agitated kettle by S1, the substance for weighing the parts by weight, and speed of agitator is set
For 140 ± 5r/min, 20s being stirred, then pours into silicon ash in agitated kettle, speed of agitator is set as 140 ± 5r/min, stirs 60s,
Cement and flyash are added sequentially in agitated kettle again later, speed of agitator is set as 140 ± 5r/min, after stirring 2min, then
Speed of agitator is changed to 285 ± 10r/min, 2min is stirred, finally pours into sand in agitated kettle, speed of agitator is set as 140 ± 5r/
Speed of agitator after stirring 1min, then is changed to 285 ± 10r/min, stirs 4min by min；
S2, the mixture obtained in step S1 is poured into mold, then mold is placed on shake table, being vibrated to surface has gas
Bubble is emerged；
S3, mold is put into curing box, is 20 ± 1 DEG C in temperature, humidity is torn open after being conserved 24 hours under conditions of being more than 95%
Mould obtains the cement-base composite material test specimen.
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| CN115650670B (en) * | 2022-10-31 | 2024-01-30 | 深圳市航天新材科技有限公司 | Sea water and sea sand concrete with large amount of fly ash and preparation method thereof |
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